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Normalized Power Transmission between ABP and ICP in TBI

Sima Shahsavari (Institutionen för signaler och system, Signalbehandling) ; Tobias Hallen ; Tomas McKelvey (Institutionen för signaler och system, Signalbehandling) ; Catherine Eriksson-Ritzen ; Bertil Rydenhag
Proceedings of the 31st Annual International Conference of the IEEE. Engineering in Medicine and Biology Society p. 4699-4703. (2009)
[Konferensbidrag, refereegranskat]

A new approach to study the pulse transmission between the cerebrovascular bed and the intracranial space is presented. In the proposed approach, the normalized power transmission between ABP and ICP has got the main attention rather than the actual power transmission. Evaluating the gain of the proposed transfer function at any single frequency can reveal how the percentage of contribution of that specific frequency component has been changed through the cerebrospinal system. The gain of the new transfer function at the fundamental cardiac frequency was utilized to evaluate the state of the brain in three TBI patients. Results were assessed using the reference evaluations achieved by a novel CT scanbased scoring scheme. In all three study cases, the gain of the transfer function showed a good capability to follow the trend of the CT scores and describe the brain state. Comparing the new transfer function with the traditional one and also the index of compensatory reserve, the proposed transfer function was found more informative about the state of the brain in the patients under study.

Nyckelord: Transfer Function, traumatic Brain Injury, Arterial Blood Pressure, Intracranial Pressure



Denna post skapades 2009-09-08. Senast ändrad 2016-05-18.
CPL Pubid: 97638

 

Institutioner (Chalmers)

Institutionen för signaler och system, Signalbehandling
Institutionen för neurovetenskap och fysiologi, sektionen för klinisk neurovetenskap och rehabilitering (2006-2016)

Ämnesområden

Signalbehandling

Chalmers infrastruktur